If
your search hasn't returned any results or it has returned too few, then
you might be able to make it more effective by keeping in mind the following
tips:

You can search
in both, english and greek! Actually, most of the government gazette
content is in greek, so you should exhaust your possible search
words in greek first. For example, the word 'tenders' is usually
found in most issues, but this usually pertains to tenders that
are published BOTH in greek and english to facilitate the participation
of international companies. Smaller projects, are only published
in greek, so use 'προσφορες'.

Try to use the
wildcard ('*' or '?') characters. This is particularly useful in
greek! For the search engine, 'προσφορα' and 'προσφορες' are two
different words. You can use 'προσφορ*' and cover all forms of the
word.

Check your spelling!!!
'Εταιρεια' instead of 'Εταιρια'.

If you are looking
for a name, then make sure the name is in the correct form. 'Κωστας'
and 'Κωνσταντινος' are not the same thing. In case you are not certain,
use both: 'Κωστας or Κωνσταντινος'. Or even better, combine with
wildcards 'Κωστα* or Κωνσταντινο*' to take into account the different
forms of the words.

If your search
doesn't return any matches, try to widen it by leaving out a few
terms. For example 'Εναλλακτικες πηγες ενεργειας' may not return
anything but 'Εναλλακτικες μορφες ενεργειας' will. It can also be
'Ανανεωσιμες πηγές ενεργειας'. So why not try 'ανανεωσιμ* ενεργεια*'
and 'εναλλακτικ* ενεργει*'. Of course, the rule of wildcards above,
applies here as well.

If you want
to see a specific issue of the gazette or the appendices, you can
go directly to it and see all of its pages, by selecting it from
the 'Go to Issue' selection box and clicking the 'Get it!' button.
This bypasses the search and gives you the whole issue to look at
page by page